gregory



R. & G. R. GREGORY.

m. A. GREGORY; ADMINISTRATRIX OF R. GREGORY, DECD.

LOCOMOTIVE BOILER FURNACE.

APPLICATION FILED MAY-25, I912- l 93,5%3 Patented Aug. 8, 1916.

2 SHEETS-SHEET 1.

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R. & G. R. GREGORY.

M. A. GREGORY. ADMINISTRATRIX or R. GREGORY, DEC'D.

LOCOMOTIVE BOILER FURNACE.

APPLICATION FILED MAY25,1912.

Patented Aug. 8, 1916.

2 SHEETS-SHEET 2.

" :a'oBEET GREGORY, nEoE'asEn, LATE or WESTMINSTER, ENGLAND, BY MARY ANN ENG &

GREGORY, ADM IN'ISTBATBIX, AND GEORGE ROBERT GREGORY, OF WESTMINSTER,

LOCOMOTIVE-BOILER FURNACE.

Patented Aug. 8, 1916.

Application filed May 25, 1912. Serial No. 699,749.

To all whom it may came a."

Be it known that ROBERT GREGORY, late of 17 Victoria street, Westminster, England, and GEORGE ROBERT GREGORY, a subject of the King of GreatBritain and Ireland, residing at Westminster, England, have 1nvented Improvements Relatmg to Locomotive-Boiler Furnaces, of which the following 7 is a specification. 1 0 7 This invention has reference to means for promoting the combustion of solid fuel in locomotive boiler furnaces by discharging above the solid fuel a gaseous mixture of liquid fuel and air; and the invention has for object to provide improved means for the production and discharge of said gaseous mixture of fuel and air, these means belng 1 so constructed and arranged as to utilize the movement of the locomotive, for automatically drawing in an air supply directly from the atmosphere in proportions suitable for admixture with the gaseous fuel, to heat such air supply by the heat of the furnace While atthe same time protecting it from contamination by the products of combustion arising from the solid fuel, and then to d1scharge said gaseous fuel into highly heated atmospheric air as it issues through a suitable nozzle above the solid fuel on the grate, so that the flame roduced consumes the smoke and COIIlbllStlblB gases arising from the solid fuel. To this end, in apparatus embodying this invention, there is provided within the furnace one or more air chambers 85 shut off from the furnace interior except for communication therewith through one Or more air nozzles, but, notwithstanding exposed to the furnace heat; air is supplied to the interiorof the said chamber, or'of each 40 such air chambers by means of an air inlet -pipe having one end connected to said chamber and its other end open and facing the direction of travel of the locomotive, the air being heated within/the air chamber without contamination by furnace gases; and means are provided for injecting into the nozzle of the air chamber or of each chamber a jet ofliquid or gasified fuel which thus becomes mixed with the heated air, and together with this air, discharged into the furnace above the solid fuel. By the injection of the liquid fuel into the air nozzle the combustion of the fuel within the air chamber is prevented.

Referring to the accompanying drawings Figure 1 is an end view, with parts removed,

of a locomotive embodying the present invention, and Fig. 2 is a sectional side view thereof. Fig. 3 is a detail view to a larger scale.

In this arrangement, within the furnace a chamber a is fitted on each side of the fire door, the lower part of each chamber being connected with an air supply pipe I) extend- 1ng below the foot plate where it is preferably formed with forwardly and rearwardly curved branches 6, 5 having trumpet mouths; the upper part of each chamber (1 1s provided with a discharge nozzle 0 directed toward the rear of the furnace. Each air chamber (1 preferably consists of a single metal plate formed integrally with its nozzle 0 and secured as shown to the furnace wall. Opposite to each nozzle 0. is an injector d that is connected to the liquid fuel containing tank e through a pipe 6 the tanks 0 may be arrangedin front of the cab and partly resting on the boiler shell. The injectors may be'worked with compressed air or, as shown,

by steam led from the boiler by pipes f to the injector. The discharge nozzles direct the mixture under the furnace arch 9 above the fire so that the flame produced on the ignition of the gaseous mixture will meet the smoke and gases and cause practically complete combustion, thereby minimizing the issue of smoke and sparks and deposit in the fire tubes. The chambers a may conveniently be of cast iron and be bolted to the front wall of the furnace some little distance above the grate, the air supply pipes 72 being secured to the outside of the boiler front and connected to the chambers by nipples or ferrules it extending through the front water space. A parting piece or division wall z extends upwardly into each air supply pipe In between its trumpet mouthed branches to direct the draft up the pipe whether the locomotive is traveling forward or backward.

For the purpose of assisting the gasification of the liquid fuel we arrange for part of the furnace gases to be conveyed from the furnace to the injector. As shown each pipe e is arranged to extend vertically from the injector casing and the liquid fuel from the tank 6 enters the vertical portion of the pipe through a nipple is just above a tube connection Z with the furnace; the liquid fuel nipple 70 may extend below the connection Z, or if desired, the liquid fuel may be delivered into the'pipe a through a small branch connected thereto below the level of the connection Z. The injector draws in liquid fuel through the nipple It and hot furnace gases through the tube Z so that the liquid fuel is heated and more or less completely gasified before reaching the injector. The liquid fuel may be fed in regulated quantities through sight feed devices of suitable kind.

What we claim is 1. The combination with a locomotive boiler furnace of an air chamber that is exposed to the furnace heat,,but that constitutes a compartment separate from the interior of the furnace with which it communicates throu h a nozzle, an air inlet pipe having one en connected to said air chamber and its other end open and facing the direction of travel of the locomotive, a liquid fuel: reservoir disposed at a higher level than said air chamber, and means for injecting fuel from said reservoir into the stream of heated air being discharged through said nozzle above the grate of the furnace, said means comprising an injector opposite to said nozzle, a fuel supply pipe connecting said fuel reservoir with said injector and having a portion extending upwardly from the inector casing, a tubular connection between the furnace and said portion, and a fuel nipple arranged within said upwardly extending portion in proximity to the junction therewith of said tubular connection, as set forth.

2. The combination with a locomotive boiler furnace of an air chamber that is exposed to the furnace heat, but that constitutes a compartment separate from the interior of the furnace with which it communicates through a IlOZZlByflIl air inlet pipe having one end connected to the lower part of said air chamber and its other end portion formed with branches whose open ends are respectively directed forwardly and backwardly, a liquid fuel reservoir disposed at a higher level than said air chamber, and means for injecting fuel from said reservoir into the stream of heated air being discharged through said nozzle above the grate of the furnace, said means comprising an injector opposite to said nozzle, a fuel supply pipe connecting said fuel reservoir with said m ector and having a portion extending upwardly from the injector casing, a tubular connection between the furnace and said portion, and a fuel nipple arranged within said upwardly extending portion in proximity to the junction therewith of said tubular connection, as set forth.

3.-- The combination with a locomotive boiler furnace of an air chamber that is exposed to the furnace heat, but that constitutes a compartment separate from the interior of the furnace with which it communicates through a nozzle, an air inlet pipe having its upper end connected to the lower part masses of said chamber and its lower and extended below the furnace and open in the direction of travel of the engine, a liquid fuel reservoir disposed at ahigher level than said air a fuel supply pipe connecting said fuel res-- ervoir with said injector and having a portion extending upwardly from the injector oasm g, a tubular connection between the furnace and saidportion, and a fuel nipple ari ranged within said upwardly extendlng portion in proximity to the junction therewith of said tubular connection, as set forth.

4. The combination with a locomotive boiler furnace of an air chamber that is exposed to the furnace heat, but that constitutes a compartment separate from the interior of the furnace-with which it communicates through a nozzle, an air inlet pipe having one en its other end open and facing the direction of travel of the locomotive, a liquid fuel reservoir disposed at a higher level than said air chamber, and means for mixing hot gases with fuel from said reservoir and then in: jecting this mixture into the stream of heated air being discharged from the nozzle above the grate of the furnace, said means comprising an injector opposite to said nozzle, a fuel supply pipe connecting said fuel reservoir with said injector and having a portion extending upwardly from the injector casing, a tubular connection between the furnace and said portion, and a fuel nipple arranged within said upwardly extending portion in proximity to the junction therewith of said tubular connection, as set forth.

5. The combination with a locomotive boiler furnace of an air chamber that is exposed to. the furnace heat, but that constitutes a compartment separate from the interior of the furnace with which it com-' municates through a nozzle, means whereby air is forced into said air chamber by the movement of the locomotive, a grate for sup porting solid fuel, a liquid fuel reservoir,

and means for injecting fuel therefrom into the stream of heated air being discharged.

- connection between the furnace and said portion and a fuel nipple arranged within said upwardly extending portion in proximity to the junction therewith of said tubular connection, as set forth.

6. A locomotive boiler furnace having a connected to said chamber and 1 plied with hot gases, said means comprising an injector opposite to said nozzle, a fuel supply pipe connecting said fuel reservoir with said injector and having a portlon extending upwardly from the injector casing,

a tubular connection between the furnace and said portion and a fuel nipple arranged within said upwardly extending portion in proximity to the junction therewith of said tubular connection, as set forth.

7. A locomotive boiler furnace having a grate for solid fuel, an internal air heating chamber that constitutes a separate compartment within said furnace, a discharge nozzle communicating with said compartment and being directed over said grate, said air heating chamber and nozzle being moreover integrally formed by a single plate secured to the furnace wall, an injector opposite said discharge nozzle, a liquid fuel reservoir arranged at a higher level than said air chamber and adapted to supply fuel directly to said injector, and means for mixing hot gas with the fuel thus supplied, said means comprising an injector opposite to said nozzle, a fuel supply pipe connecting said fuel 'reservoir with said injector and having a portion extending upwardly from the injector casing, a tubular connection between the furnace and said portion, and a fuel nipple arranged within said upwardly extending portion in proximity to the junction therewith of said tubular connection, as set forth.

8. The combination with a locomotive boiler furnace of an air chamber that is exposed to the furnace heat but that constitutes a compartment separate from the interior, of the furnace, with which it communicates through a nozzle, an air inlet pipe having one end open and facing the direction of travel of the locomotive, a liquid fuel reservoir disposed at a higher level than said air chamber, means for heating and injecting liquid fuel from said reservoir and discharging the heated fuel and air through said nozzle above the grate of the furnace,

as set forth.

Signed at London, England, this 18th day of May, 1912.

MARY ANN GREGORY, Administratfiw of the E state of Robert Gregory, deceased.

GEORGE ROBERT GREGORY. Witnesses: I

B. WESTERN, O. J. DORTH. 

